Benadryl and Zyrtec are both considered generally safe and well-tolerated by most dogs. The most common side effect of Benadryl is drowsiness, which is why some pet parents prefer Zyrtecits a non-drowsy option that still offers relief from mild allergies.
Benadryl (diphenhydramine) and Zyrtec (cetirizine hydrochloride) are antihistamines used to treat allergy symptoms, such as itching, hives, runny nose, watery eyes, and sneezing from hay fever (allergic rhinitis) and other allergies, such as allergies to molds and dust mites.

Furthermore, visual representations like the one above help us fully grasp the concept of Zyrtec Vs Benedryl For Dogs With Hives And Itching.
Limited information exists on acrivastine and cetirizine use in dogs, so if youre in Europe, make sure the active ingredient is diphenhydramine, the only form of Benadryl thats considered safe for dogs. Other safe antihistamines for dogs include Claritin. (loratadine) and Zyrtec.

Benadryl for hives, itching, and rash. Some topical OTC Benadryl products are approved for treating hives, itchy skin, and rash. These products include: Benadryl Itch Stopping Cream.